Astronomy and Astrophysics, volume 526A, 111-111 (2011/2-1)
The HARPS search for southern extra-solar planets. XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets.
MORDASINI C., MAYOR M., UDRY S., LOVIS C., SEGRANSAN D., BENZ W., BERTAUX J.-L., BOUCHY F., LO CURTO G., MOUTOU C., NAEF D., PEPE F., QUELOZ D. and SANTOS N.C.
Abstract (from CDS):
We report the detection of three new extrasolar planets orbiting the solar type stars HD85390
with the HARPS spectrograph mounted on the ESO 3.6-m telescope at La Silla observatory. HD85390
has a planetary companion with a projected intermediate mass (42.0M⊕
) on a 788-day orbit (a=1.52AU) with an eccentricity of 0.41, for which there is no analog in the solar system. A drift in the data indicates the presence of another companion on a long-period orbit, which is however not covered by our measurements. HD90156
is orbited by a warm Neptune analog with a minimum mass of 17.98M⊕
), a period of 49.8-days (a=0.25AU), and an eccentricity of 0.31. HD103197
has an intermediate-mass planet on a circular orbit (P=47.8d, Msini=31.2M⊕
). We discuss the formation of planets of intermediate mass (∼30-100M⊕
), which should be rare inside a few AU according to core accretion formation models.
planetary systems - techniques: radial velocities - stars: individual: HD 85390 - stars: individual: HD 90156 - stars: individual: HD 103197 - planetary systems: formation
VizieR on-line data:
<Available at CDS (J/A+A/526/A111): table1.dat table2.dat table3.dat table4.dat table5.dat>
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